Andrew Watson "Butch" Armour III (October 22, 1908 – December 27, 1991) was a member of the prominent Armour family of meatpacking fame (Armour and Company), a company president, and notable philanthropist who, together with his wife Sarah Wood Armour, gave millions of dollars to Princeton University, St. Mark's School, Chicago's Field Museum of Natural History, and other charitable causes.